package com.itheima.interceptors;

import com.itheima.utils.JwtUtil;
import com.itheima.utils.ThreadLocalUtil;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.servlet.HandlerInterceptor;

import java.util.Map;

@Component
public class LoginInterceptor implements HandlerInterceptor {


    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        //令牌校验
        String token=request.getHeader("Authorization");

        try {
            //从redis中获取相同的Token

            ValueOperations<String,String> operations=stringRedisTemplate.opsForValue();

            String redisToken=operations.get(token);

            if(redisToken==null)
            {
                //token失效
                throw new RuntimeException();

            }

            Map<String,Object> claims= JwtUtil.parseToken(token);
            //把业务数据存储在ThreadLocal中
            ThreadLocalUtil.set(claims);
            //放行
            return true;
        } catch (Exception e) {

            //设置响应状态码
            response.setStatus(401);
            //不放行
            return false;
        }


    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        ThreadLocalUtil.remove();
    }
}













